<template>
   <ul class="navs">
        <!-- {{$store.state.category.list}} -->
        <li class="home"><RouterLink to="/">首页</RouterLink></li>
        <li v-for="item in list " :key="item.id" @mouseenter="show(item.id)" @mouseleave="hide(item.id)">
            <RouterLink @click="hide(item.id)" :to="`/category/${item.id}`" href="#">{{item.name}}</RouterLink>
            <div class="layer" :class="{open:item.open}">
                <ul>
                    <li v-for="sub in item.children" :key="sub.id">
             <router-link @click="hide(item.id)" :to="`/category/sub/${sub.id}`" href="#">
              <img :src="sub.picture">
              <p>{{sub.name}}</p>
             </router-link>
          </li>
            </ul>
            </div>
        </li>
      </ul>
</template>

<script>
import { computed } from '@vue/runtime-core'
import { useStore } from 'vuex'

export default {
  name: 'AppHeaderNav',
  setup () {
    const store = useStore()
    const list = computed(() => {
      return store.state.category.list
    })

    const show = (id) => {
      store.commit('category/show', id)
    }
    const hide = (id) => {
      store.commit('category/hide', id)
    }
    return { list, show, hide }
  }
}
</script>

<style scoped lang="less">
.navs {
    width: 820px;
    position: relative;
    display: flex;
    justify-content: space-around;
    padding-left: 40px;
    >li {
      margin-right: 40px;
      width: 38px;
      text-align: center;
      >a {
        font-size: 16px;
        line-height: 32px;
        height: 32px;
        display: inline-block;
      }
      &:hover {
        >a {
          color: @xtxColor;
          border-bottom: 1px solid @xtxColor;
        }
      //    >.layer {
      //   height: 132px;
      //   opacity: 1;
      // }
      }
    }
  }
  .layer {
   &.open {
      height: 132px;
       opacity: 1;
    }
  width: 1240px;
  background-color: #fff;
  position: absolute;
  left: -200px;
  z-index: 100;
  top: 56px;
  height: 0;
  overflow: hidden;
  opacity: 0;
  box-shadow: 0 0 5px #ccc;
  transition: all .2s .1s;
  ul {
    display: flex;
    flex-wrap: wrap;
    padding: 0 70px;
    align-items: center;
    height: 132px;
    li {
      width: 110px;
      text-align: center;
      img {
        width: 60px;
        height: 60px;
      }
      p {
        padding-top: 10px;
      }
      &:hover {
        p {
          color: @xtxColor;
        }
      }
    }
  }
}
</style>
